dye|World dye variety

Name:C.I.Direct Red 18,C.I.22280

Molecular Structure: Double azo class

C.I.Direct Red 18,C.I.22280,CAS 6548-26-1,714.57,C29H17N4Na3O10S2,Paramine Fast Bordeaux B

Molecular Formula:C₂₉H₁₇N₄Na₃O₁₀S₂

Molecular Weight: 714.57

CAS Registry Number:6548-26-1

Manufacturing Methods : 4-(4-Aminophenyl)benzenamine double nitriding, first with 2-Hydroxybenzoic acid coupling, again with 3-Hydroxynaphthalene-2,7-disulfonic acid coupling.

Properties and Applications: red red to blue light. Slightly soluble in water for pink, soluble in ethanol, insoluble in other organic solvents. The strong sulfuric acid to red light purple, orange for diluted. The dye solution with strong hydrochloric acid is palm red light, precipitation; Add thick sodium hydroxide solution have yellow precipitation.

List of Suppliers:

Paramine Fast Bordeaux B (  Holliday L B & Co Ltd )